In fact, e-books took the lead three month ago, since which time Amazon says it’s sold 143 Kindle books for every 100 hardcover books. What’s more, leaving their physical counterparts in the proverbial dust, e-books have outsold hardcovers at a rate of 180-to-100 over the last four weeks. (via mediapost)

The news marked “a day for the history books — if those will even exist in the future,” quipped The New York Times.